© The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2021
R. La LauPractical Internet Server Configurationhttps://doi.org/10.1007/978-1-4842-6960-2_7

7. Secure Shell (SSH)

Robert La Lau1  
Blain, France

Secure shell is a network protocol for the creation of encrypted connections. In its original and purest form, it is used to open a remote terminal and execute commands. However, the protocol can also be used for file transfer (SCP, SFTP); as an encrypted transport protocol for other, possible less strongly secured protocols; and for port forwarding—the redirection of requests for certain ports to ports on other servers—a technique often used to allow machines on different sides of a firewall to communicate.

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